Utah Cities With the Most Contaminants on Record
Utah public water systems with the most distinct contaminants on the EPA record, ranked.
151 cities on this list · updated 2026
| # | City | Contaminants on record |
|---|---|---|
| 1 | Cedar Citytop: Radium (combined -226 & -228) | 15 |
| 2 | Monticellotop: Nitrate | 14 |
| 3 | Sandytop: Fluoride | 13 |
| 4 | Provotop: Radium (combined -226 & -228) | 13 |
| 5 | Heber Citytop: Cadmium | 13 |
| 6 | Moabtop: Nitrate | 13 |
| 7 | Mornitop: Nitrate | 13 |
| 8 | New Harmonytop: Nitrate | 13 |
| 9 | Eurekatop: Nitrate | 13 |
| 10 | Centraltop: Nitrate | 13 |
| 11 | Hurricanetop: Nitrate | 11 |
| 12 | Roosevelttop: Total Trihalomethanes (TTHM) | 11 |
| 13 | Bullfrogtop: Nitrate | 11 |
| 14 | Glendaletop: Nitrate | 11 |
| 15 | Altontop: Nitrate | 11 |
| 16 | Portagetop: Nitrate | 11 |
| 17 | Cornishtop: Nitrate | 11 |
| 18 | Stansbury Parktop: Haloacetic Acids (HAA5) | 10 |
| 19 | Santa Claratop: Nitrate | 9 |
| 20 | Midwaytop: Arsenic | 9 |
| 21 | Wallsburgtop: Cadmium | 9 |
| 22 | Greenwichtop: Nitrate | 9 |
| 23 | Edentop: Arsenic | 8 |
| 24 | Alpinetop: PFOA | 8 |
| 25 | Garlandtop: Nitrate | 7 |
| 26 | Spring Citytop: Nitrate | 7 |
| 27 | Cedar Valleytop: Fluoride | 7 |
| 28 | Clintontop: Gross Beta / Photon Emitters | 6 |
| 29 | Park Citytop: Nitrate | 6 |
| 30 | Salt Lake Citytop: Haloacetic Acids (HAA5) | 5 |
Methodology. Ranked by the number of distinct contaminants with an EPA record for each city's primary water system. Built from public U.S. EPA drinking-water records (SDWIS violations + UCMR5 PFAS monitoring) for community water systems. A higher count or a lower Water Score reflects what's on the federal record — not a judgment of any utility. Meeting legal limits is not the same as zero risk.
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